How to Make a Seamless Audio Loop From a Clip
Updated 2026-06-21
To make a seamless audio loop, trim your clip so the end flows back into the start with no click or gap: set a precise start and end point, preview the loop on repeat, nudge the bounds until the seam disappears, then export the segment. You can do all of this locally in your browser with the Audio/Video Loop Trimmer — no upload, no signup, no watermark.
Set precise loop points
Start by loading a local audio or video file (up to 500 MB). The tool decodes it in your browser and draws a timeline waveform you can scrub.
You have three ways to set the loop bounds, and you'll usually mix them:
- Drag the Start and End sliders along the timeline for a rough selection.
- Type exact values into the number fields. They accept 0.01-second steps, so you can land on a precise frame of sound.
- Scrub the player to a moment, then click Set start to playhead or Set end to playhead to mark the exact current position.
The Start, End, and Length stats update live, so you always know how long your loop will be before exporting.
Preview until the seam disappears
A loop is "seamless" when the listener can't tell where it restarts. Click Preview loop to hear your selection repeat between the start and end points, and Stop loop when you're done.
Listen specifically for the transition from end back to start. If you hear a click, pop, or rhythmic stutter, the bounds are slightly off. Use these fixes:
- For music, place both the start and end on a beat — ideally the same point in the bar (for example, the downbeat). Loops that span a whole number of beats restart naturally.
- For ambient or tonal sound, aim for a zero-crossing feel: trim to a quiet moment or a steady sustain where the waveform level matches at both ends. A sudden jump in volume is what causes the click.
- Nudge one bound by 0.01 to 0.05 seconds at a time and re-preview. Small moves usually fix a stubborn seam.
Export your loop
Once the preview sounds clean, click Export segment (.wav). The tool saves the selected segment's audio as a 16-bit PCM WAV file, named with the original filename plus the start and end times — for example, a clip trimmed from 0.00 to 3.50 seconds downloads as clip_0.00-3.50.wav.
A few things to know:
- WAV is uncompressed and lossless, which makes it ideal as a source loop for a game engine, a sampler, a video editor, or a sound bed. Convert to MP3 or OGG later if you need a smaller file.
- For video files, the preview lets you trim visually, but export saves only the selected audio track as a WAV — it does not re-encode video.
- Common formats like MP3, WAV, AAC/M4A, MP4, and WebM decode reliably. Less common codecs such as FLAC or OGG may show a warning and occasionally fail to decode in some browsers.
Because every step — decoding, previewing, and encoding the WAV — runs on your own device, your file is never uploaded.
Ready to trim a clean loop? Open the Audio/Video Loop Trimmer and drop in your clip.